<html xmlns="http://www.w3.org/1999/xhtml">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <form action="/index.php?m=&c=report&a=jhuploadexcel" onSubmit="return closebut()" method="post" enctype="multipart/form-data">
            <input type="file" name="import"/>
            <input type="hidden" name="table" value="tablename"/>
            <input type="submit" id="aa" value="导入"/>
        </form>
<script>function closebut(){
document.getElementById("aa").disabled=true;
}
</script>
</html>